So I tried the gfx efi string method, but I still don't have QE/CI...

This is what currently shows up under graphics in about this mac

NVIDIA GeForce 7900 GS:

Chipset Model: NVIDIA GeForce 7900 GS
Type: Display
Bus: PCIe
PCIe Lane Width: x16
VRAM (Total): 256 MB
Vendor: NVIDIA (0x10de)
Device ID: 0x0292
Revision ID: 0x00a1
ROM Revision: 0x000000a1
Displays:
VGA Display:
Resolution: 1280 x 1024 @ 75 Hz
Depth: 32-bit Color
Core Image: Software
Main Display: Yes
Mirror: Off
Online: Yes
Quartz Extreme: Not Supported
Display Connector:
Status: No display connected

Anything else I can try?